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{{From|https://help.ubuntu.com/community/DowngradeHowto}} {{Languages|UbuntuHelp:DowngradeHowto}} :DO NOT DO THIS. YOU CANNOT DOWNGRADE PYTHON ACROSS PACKAGES FROM HARDY TO GUTSY. I tried this to downgrade from intrepid to hardy again. It worked almost fine, until the ati-drivers came into place! You must remove all Third-party-packages before and downgrade without any X loaded. Then it might work. == Downgrade == So, for one reason or another, you've upgraded Ubuntu to a new version. Now, you're not liking the new version (or it's a development version and too unstable for your taste). Downgrading is a little-covered topic, but let's change that! === DISCLAIMER === This document is still under development. I have *YET TO TEST THE PROCEDURE*. Please pursue at your own risk until this documentation is completed! === Getting Started === For this guide, we'll use the example of downgrading Ubuntu Breezy to Ubuntu Hoary. This guide can be adapted to downgrade any combination of releases. === The Procedure === ==== Setting up sources ==== You'll need sources.list entries for both releases for the procedure to work properly. It's important to remove all other lines for now! Example sources.list: <pre><nowiki> deb http://archive.ubuntu.com/ubuntu hoary main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu breezy main restricted universe multiverse</nowiki></pre> ==== Setting up pinning ==== Open up /etc/apt/preferences with your favorite editor (such as <code><nowiki>gksudo gedit /etc/apt/preferences</nowiki></code>) Add the following lines to the file (remove any existing entries): <pre><nowiki> Package: * Pin: release a=hoary Pin-Priority: 1001 Package: * Pin: release a=breezy Pin-Priority: 60 </nowiki></pre> ==== Doing the downgrade ==== If you're ready to continue, we're going to continue: First, we need to update APT's information: <code><nowiki>sudo apt-get update</nowiki></code> Next, we'll downgrade: <code><nowiki>sudo apt-get dist-upgrade</nowiki></code> ==== Cleaning up after the storm ==== The last step probably will end up a catastrophic mess of incompletely installed packages. We need to fix that now. === Sources === http://linuxmafia.com/faq/Debian/downgrade.html ---- [[category:CategoryDocumentation]] [[category:UbuntuHelp]]
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